In the context of Czech television, the show you are referring to is Výměna manželek (Wife Swap), which is a popular long-running reality series on the TV Nova network.
In a modern, high-tech flat in Prague, Jana—a meticulous interior designer—found herself staring at a mountain of laundry that belonged to a family she barely knew. Across the country, in a rustic farmhouse tucked away in the Moravian hills, Lenka was grappling with a smart-home system that seemed to have a mind of its own.
The show is popular because it allows viewers to peek into the private lives of others and compare their own lifestyles with the participants. While the original format focused on traditional families, recent seasons have expanded to include lesbian and gay couples and even VIP celebrity editions. Season 11, Episode 2: Why It Is Trending